./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:05:54,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:05:54,888 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:05:54,893 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:05:54,894 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:05:54,916 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:05:54,916 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:05:54,917 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:05:54,917 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:05:54,918 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:05:54,918 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:05:54,918 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:05:54,919 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:05:54,919 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:05:54,920 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:05:54,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:05:54,921 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:05:54,921 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:05:54,921 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:05:54,922 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:05:54,922 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:05:54,926 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:05:54,927 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:05:54,927 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:05:54,929 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:05:54,930 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:05:54,930 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:05:54,930 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:05:54,930 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:05:54,931 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:05:54,931 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:05:54,931 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:05:54,932 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:05:54,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:05:54,932 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:05:54,933 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:05:54,933 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:05:54,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:05:54,934 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:05:54,934 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:05:54,935 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:05:54,936 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:05:54,936 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 [2024-11-10 18:05:55,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:05:55,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:05:55,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:05:55,230 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:05:55,230 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:05:55,232 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2024-11-10 18:05:56,763 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:05:57,027 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:05:57,029 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2024-11-10 18:05:57,051 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fb51a704/f8e59d7f0af64eef9a082b0a4b98baf5/FLAG664815985 [2024-11-10 18:05:57,068 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fb51a704/f8e59d7f0af64eef9a082b0a4b98baf5 [2024-11-10 18:05:57,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:05:57,072 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:05:57,074 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:05:57,074 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:05:57,079 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:05:57,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:05:57" (1/1) ... [2024-11-10 18:05:57,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@342dd732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:57, skipping insertion in model container [2024-11-10 18:05:57,081 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:05:57" (1/1) ... [2024-11-10 18:05:57,137 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:05:57,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:05:57,771 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:05:57,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:05:58,017 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:05:58,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58 WrapperNode [2024-11-10 18:05:58,022 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:05:58,024 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:05:58,024 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:05:58,024 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:05:58,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (1/1) ... [2024-11-10 18:05:58,064 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (1/1) ... [2024-11-10 18:05:58,100 INFO L138 Inliner]: procedures = 372, calls = 88, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 186 [2024-11-10 18:05:58,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:05:58,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:05:58,102 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:05:58,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:05:58,114 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (1/1) ... [2024-11-10 18:05:58,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (1/1) ... [2024-11-10 18:05:58,120 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (1/1) ... [2024-11-10 18:05:58,139 INFO L175 MemorySlicer]: Split 78 memory accesses to 3 slices as follows [50, 14, 14]. 64 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [50, 10, 0]. The 11 writes are split as follows [0, 1, 10]. [2024-11-10 18:05:58,140 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (1/1) ... [2024-11-10 18:05:58,140 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (1/1) ... [2024-11-10 18:05:58,152 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (1/1) ... [2024-11-10 18:05:58,153 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (1/1) ... [2024-11-10 18:05:58,155 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (1/1) ... [2024-11-10 18:05:58,157 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (1/1) ... [2024-11-10 18:05:58,165 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:05:58,166 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:05:58,166 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:05:58,167 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:05:58,171 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (1/1) ... [2024-11-10 18:05:58,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:05:58,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:05:58,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:05:58,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:05:58,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-10 18:05:58,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-10 18:05:58,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-10 18:05:58,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-10 18:05:58,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-10 18:05:58,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-10 18:05:58,244 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 18:05:58,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:05:58,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:05:58,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 18:05:58,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:05:58,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:05:58,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 18:05:58,245 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 18:05:58,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:05:58,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:05:58,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-10 18:05:58,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-10 18:05:58,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-10 18:05:58,246 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-10 18:05:58,246 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-10 18:05:58,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:05:58,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:05:58,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 18:05:58,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:05:58,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:05:58,248 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:05:58,411 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:05:58,414 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:05:58,854 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:05:58,855 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:05:59,245 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:05:59,245 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:05:59,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:05:59 BoogieIcfgContainer [2024-11-10 18:05:59,246 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:05:59,248 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:05:59,249 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:05:59,254 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:05:59,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:05:57" (1/3) ... [2024-11-10 18:05:59,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e867c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:05:59, skipping insertion in model container [2024-11-10 18:05:59,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:05:58" (2/3) ... [2024-11-10 18:05:59,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e867c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:05:59, skipping insertion in model container [2024-11-10 18:05:59,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:05:59" (3/3) ... [2024-11-10 18:05:59,257 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr.i [2024-11-10 18:05:59,276 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:05:59,276 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-11-10 18:05:59,276 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:05:59,344 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 18:05:59,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 79 transitions, 162 flow [2024-11-10 18:05:59,447 INFO L124 PetriNetUnfolderBase]: 4/78 cut-off events. [2024-11-10 18:05:59,447 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:05:59,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 78 events. 4/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 284 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2024-11-10 18:05:59,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 79 transitions, 162 flow [2024-11-10 18:05:59,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 78 transitions, 159 flow [2024-11-10 18:05:59,463 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:05:59,471 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@8d97b7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:05:59,472 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-10 18:05:59,479 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:05:59,479 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2024-11-10 18:05:59,479 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:05:59,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:05:59,480 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 18:05:59,481 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:05:59,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:05:59,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1367352959, now seen corresponding path program 1 times [2024-11-10 18:05:59,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:05:59,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459974703] [2024-11-10 18:05:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:05:59,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:05:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:05:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:05:59,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:05:59,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459974703] [2024-11-10 18:05:59,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459974703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:05:59,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:05:59,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:05:59,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937889158] [2024-11-10 18:05:59,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:05:59,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 18:05:59,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:05:59,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 18:05:59,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 18:05:59,774 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 79 [2024-11-10 18:05:59,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 159 flow. Second operand has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:05:59,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:05:59,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 79 [2024-11-10 18:05:59,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:05:59,923 INFO L124 PetriNetUnfolderBase]: 65/272 cut-off events. [2024-11-10 18:05:59,923 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:05:59,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 272 events. 65/272 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1385 event pairs, 63 based on Foata normal form. 2/213 useless extension candidates. Maximal degree in co-relation 377. Up to 155 conditions per place. [2024-11-10 18:05:59,928 INFO L140 encePairwiseOnDemand]: 77/79 looper letters, 28 selfloop transitions, 0 changer transitions 0/76 dead transitions. [2024-11-10 18:05:59,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 211 flow [2024-11-10 18:05:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 18:05:59,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 18:05:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 128 transitions. [2024-11-10 18:05:59,942 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.810126582278481 [2024-11-10 18:05:59,945 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 159 flow. Second operand 2 states and 128 transitions. [2024-11-10 18:05:59,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 211 flow [2024-11-10 18:05:59,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:05:59,951 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 154 flow [2024-11-10 18:05:59,953 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=154, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-11-10 18:05:59,957 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2024-11-10 18:05:59,957 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 154 flow [2024-11-10 18:05:59,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:05:59,957 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:05:59,957 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:05:59,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:05:59,958 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:05:59,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:05:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash 560194299, now seen corresponding path program 1 times [2024-11-10 18:05:59,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:05:59,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314597365] [2024-11-10 18:05:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:05:59,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:00,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:00,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314597365] [2024-11-10 18:06:00,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314597365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:00,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:00,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:06:00,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87120735] [2024-11-10 18:06:00,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:00,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:06:00,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:06:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:06:00,136 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-10 18:06:00,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:00,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:00,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-10 18:06:00,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:00,310 INFO L124 PetriNetUnfolderBase]: 65/274 cut-off events. [2024-11-10 18:06:00,311 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:06:00,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 274 events. 65/274 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1382 event pairs, 63 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 432. Up to 156 conditions per place. [2024-11-10 18:06:00,316 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 28 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2024-11-10 18:06:00,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 77 transitions, 216 flow [2024-11-10 18:06:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2024-11-10 18:06:00,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7383966244725738 [2024-11-10 18:06:00,321 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 154 flow. Second operand 3 states and 175 transitions. [2024-11-10 18:06:00,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 77 transitions, 216 flow [2024-11-10 18:06:00,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:06:00,325 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 166 flow [2024-11-10 18:06:00,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2024-11-10 18:06:00,326 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2024-11-10 18:06:00,327 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 166 flow [2024-11-10 18:06:00,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:00,328 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:00,329 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:00,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:06:00,331 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:00,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:00,331 INFO L85 PathProgramCache]: Analyzing trace with hash -749782607, now seen corresponding path program 1 times [2024-11-10 18:06:00,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:00,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017021046] [2024-11-10 18:06:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:00,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:00,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:00,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017021046] [2024-11-10 18:06:00,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017021046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:00,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753212962] [2024-11-10 18:06:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:00,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:00,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:00,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:06:00,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:06:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:00,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-10 18:06:00,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:00,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:06:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:00,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753212962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:06:00,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:06:00,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-10 18:06:00,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626085544] [2024-11-10 18:06:00,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:06:00,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:06:00,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:00,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:06:00,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:06:00,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-10 18:06:00,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 166 flow. Second operand has 7 states, 7 states have (on average 49.42857142857143) internal successors, (346), 7 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:00,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:00,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-10 18:06:00,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:00,874 INFO L124 PetriNetUnfolderBase]: 65/280 cut-off events. [2024-11-10 18:06:00,878 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-10 18:06:00,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 280 events. 65/280 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1382 event pairs, 63 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 449. Up to 156 conditions per place. [2024-11-10 18:06:00,881 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 28 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2024-11-10 18:06:00,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 244 flow [2024-11-10 18:06:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:06:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:06:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 324 transitions. [2024-11-10 18:06:00,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6835443037974683 [2024-11-10 18:06:00,888 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 166 flow. Second operand 6 states and 324 transitions. [2024-11-10 18:06:00,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 244 flow [2024-11-10 18:06:00,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 80 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:06:00,893 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 200 flow [2024-11-10 18:06:00,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2024-11-10 18:06:00,894 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 10 predicate places. [2024-11-10 18:06:00,894 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 200 flow [2024-11-10 18:06:00,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.42857142857143) internal successors, (346), 7 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:00,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:00,895 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:00,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:06:01,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:01,096 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:01,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:01,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1957315373, now seen corresponding path program 2 times [2024-11-10 18:06:01,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:01,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50871743] [2024-11-10 18:06:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:01,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 18:06:01,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:01,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50871743] [2024-11-10 18:06:01,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50871743] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:01,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:01,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:06:01,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653544128] [2024-11-10 18:06:01,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:01,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:06:01,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:01,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:06:01,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:06:01,270 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2024-11-10 18:06:01,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:01,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:01,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2024-11-10 18:06:01,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:01,370 INFO L124 PetriNetUnfolderBase]: 65/276 cut-off events. [2024-11-10 18:06:01,371 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-10 18:06:01,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 276 events. 65/276 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1353 event pairs, 63 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 457. Up to 157 conditions per place. [2024-11-10 18:06:01,375 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 30 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2024-11-10 18:06:01,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 76 transitions, 260 flow [2024-11-10 18:06:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2024-11-10 18:06:01,380 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6877637130801688 [2024-11-10 18:06:01,380 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 200 flow. Second operand 3 states and 163 transitions. [2024-11-10 18:06:01,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 76 transitions, 260 flow [2024-11-10 18:06:01,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 76 transitions, 252 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 18:06:01,383 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 192 flow [2024-11-10 18:06:01,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-11-10 18:06:01,384 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2024-11-10 18:06:01,385 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 192 flow [2024-11-10 18:06:01,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:01,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:01,385 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:01,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:06:01,385 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:01,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:01,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1957315372, now seen corresponding path program 1 times [2024-11-10 18:06:01,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:01,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830800523] [2024-11-10 18:06:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:01,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:01,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:01,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830800523] [2024-11-10 18:06:01,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830800523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:01,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675369020] [2024-11-10 18:06:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:01,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:01,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:01,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:06:01,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:06:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:01,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 18:06:01,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:01,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:06:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:01,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675369020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:06:01,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:06:01,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-10 18:06:01,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115592055] [2024-11-10 18:06:01,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:06:01,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:06:01,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:01,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:06:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:06:01,742 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-10 18:06:01,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 192 flow. Second operand has 13 states, 13 states have (on average 49.23076923076923) internal successors, (640), 13 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:01,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:01,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-10 18:06:01,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:01,846 INFO L124 PetriNetUnfolderBase]: 65/288 cut-off events. [2024-11-10 18:06:01,846 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2024-11-10 18:06:01,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 288 events. 65/288 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1369 event pairs, 63 based on Foata normal form. 6/237 useless extension candidates. Maximal degree in co-relation 486. Up to 156 conditions per place. [2024-11-10 18:06:01,851 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 28 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-11-10 18:06:01,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 82 transitions, 306 flow [2024-11-10 18:06:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:06:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:06:01,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 621 transitions. [2024-11-10 18:06:01,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6550632911392406 [2024-11-10 18:06:01,853 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 192 flow. Second operand 12 states and 621 transitions. [2024-11-10 18:06:01,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 82 transitions, 306 flow [2024-11-10 18:06:01,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 82 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:06:01,860 INFO L231 Difference]: Finished difference. Result has 100 places, 82 transitions, 268 flow [2024-11-10 18:06:01,861 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=268, PETRI_PLACES=100, PETRI_TRANSITIONS=82} [2024-11-10 18:06:01,862 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 22 predicate places. [2024-11-10 18:06:01,863 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 82 transitions, 268 flow [2024-11-10 18:06:01,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 49.23076923076923) internal successors, (640), 13 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:01,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:01,865 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:01,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 18:06:02,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:02,071 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:02,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:02,071 INFO L85 PathProgramCache]: Analyzing trace with hash 377667224, now seen corresponding path program 2 times [2024-11-10 18:06:02,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:02,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446781505] [2024-11-10 18:06:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:02,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:02,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:02,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446781505] [2024-11-10 18:06:02,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446781505] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:02,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:02,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:06:02,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266767583] [2024-11-10 18:06:02,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:02,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:06:02,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:02,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:06:02,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:06:02,270 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2024-11-10 18:06:02,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 82 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:02,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:02,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2024-11-10 18:06:02,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:02,361 INFO L124 PetriNetUnfolderBase]: 65/284 cut-off events. [2024-11-10 18:06:02,361 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-11-10 18:06:02,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 284 events. 65/284 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1320 event pairs, 63 based on Foata normal form. 2/231 useless extension candidates. Maximal degree in co-relation 501. Up to 163 conditions per place. [2024-11-10 18:06:02,363 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 34 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2024-11-10 18:06:02,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 78 transitions, 336 flow [2024-11-10 18:06:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:02,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2024-11-10 18:06:02,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7046413502109705 [2024-11-10 18:06:02,365 INFO L175 Difference]: Start difference. First operand has 100 places, 82 transitions, 268 flow. Second operand 3 states and 167 transitions. [2024-11-10 18:06:02,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 78 transitions, 336 flow [2024-11-10 18:06:02,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 78 transitions, 300 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-11-10 18:06:02,369 INFO L231 Difference]: Finished difference. Result has 93 places, 78 transitions, 232 flow [2024-11-10 18:06:02,369 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=93, PETRI_TRANSITIONS=78} [2024-11-10 18:06:02,370 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 15 predicate places. [2024-11-10 18:06:02,370 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 78 transitions, 232 flow [2024-11-10 18:06:02,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:02,370 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:02,371 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:02,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:06:02,371 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:02,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:02,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2134003776, now seen corresponding path program 1 times [2024-11-10 18:06:02,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:02,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193919092] [2024-11-10 18:06:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:02,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:02,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:02,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193919092] [2024-11-10 18:06:02,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193919092] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:02,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:02,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:06:02,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216877292] [2024-11-10 18:06:02,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:02,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:06:02,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:06:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:06:02,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 79 [2024-11-10 18:06:02,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 78 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 43.166666666666664) internal successors, (259), 6 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:02,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:02,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 79 [2024-11-10 18:06:02,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:02,889 INFO L124 PetriNetUnfolderBase]: 74/302 cut-off events. [2024-11-10 18:06:02,889 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-10 18:06:02,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 302 events. 74/302 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1412 event pairs, 72 based on Foata normal form. 1/254 useless extension candidates. Maximal degree in co-relation 526. Up to 185 conditions per place. [2024-11-10 18:06:02,892 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 40 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2024-11-10 18:06:02,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 74 transitions, 306 flow [2024-11-10 18:06:02,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2024-11-10 18:06:02,894 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.679324894514768 [2024-11-10 18:06:02,894 INFO L175 Difference]: Start difference. First operand has 93 places, 78 transitions, 232 flow. Second operand 3 states and 161 transitions. [2024-11-10 18:06:02,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 74 transitions, 306 flow [2024-11-10 18:06:02,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 74 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:06:02,899 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 218 flow [2024-11-10 18:06:02,900 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2024-11-10 18:06:02,901 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 11 predicate places. [2024-11-10 18:06:02,901 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 218 flow [2024-11-10 18:06:02,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 43.166666666666664) internal successors, (259), 6 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:02,902 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:02,902 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:02,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 18:06:02,903 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:02,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:02,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2134003775, now seen corresponding path program 1 times [2024-11-10 18:06:02,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:02,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936689626] [2024-11-10 18:06:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:02,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:03,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:03,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936689626] [2024-11-10 18:06:03,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936689626] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:03,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:03,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:06:03,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122247119] [2024-11-10 18:06:03,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:03,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:06:03,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:03,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:06:03,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:06:03,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 79 [2024-11-10 18:06:03,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:03,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:03,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 79 [2024-11-10 18:06:03,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:03,604 INFO L124 PetriNetUnfolderBase]: 65/292 cut-off events. [2024-11-10 18:06:03,605 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-10 18:06:03,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 292 events. 65/292 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1250 event pairs, 63 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 502. Up to 167 conditions per place. [2024-11-10 18:06:03,607 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 41 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2024-11-10 18:06:03,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 81 transitions, 328 flow [2024-11-10 18:06:03,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:06:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:06:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-11-10 18:06:03,609 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5848101265822785 [2024-11-10 18:06:03,609 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 218 flow. Second operand 5 states and 231 transitions. [2024-11-10 18:06:03,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 81 transitions, 328 flow [2024-11-10 18:06:03,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 81 transitions, 327 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:06:03,612 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 267 flow [2024-11-10 18:06:03,612 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2024-11-10 18:06:03,613 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2024-11-10 18:06:03,613 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 267 flow [2024-11-10 18:06:03,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:03,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:03,614 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:03,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:06:03,614 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:03,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:03,615 INFO L85 PathProgramCache]: Analyzing trace with hash 19415, now seen corresponding path program 1 times [2024-11-10 18:06:03,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:03,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526761249] [2024-11-10 18:06:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:03,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:04,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:04,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526761249] [2024-11-10 18:06:04,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526761249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:04,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:04,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:06:04,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421554083] [2024-11-10 18:06:04,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:04,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:06:04,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:04,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:06:04,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:06:04,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 79 [2024-11-10 18:06:04,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 42.57142857142857) internal successors, (298), 7 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:04,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:04,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 79 [2024-11-10 18:06:04,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:04,847 INFO L124 PetriNetUnfolderBase]: 65/288 cut-off events. [2024-11-10 18:06:04,848 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2024-11-10 18:06:04,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 288 events. 65/288 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1216 event pairs, 63 based on Foata normal form. 2/244 useless extension candidates. Maximal degree in co-relation 519. Up to 160 conditions per place. [2024-11-10 18:06:04,850 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 34 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-11-10 18:06:04,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 77 transitions, 353 flow [2024-11-10 18:06:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:06:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:06:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 319 transitions. [2024-11-10 18:06:04,854 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5768535262206148 [2024-11-10 18:06:04,854 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 267 flow. Second operand 7 states and 319 transitions. [2024-11-10 18:06:04,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 77 transitions, 353 flow [2024-11-10 18:06:04,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 77 transitions, 349 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:06:04,857 INFO L231 Difference]: Finished difference. Result has 96 places, 77 transitions, 281 flow [2024-11-10 18:06:04,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=281, PETRI_PLACES=96, PETRI_TRANSITIONS=77} [2024-11-10 18:06:04,858 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 18 predicate places. [2024-11-10 18:06:04,858 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 77 transitions, 281 flow [2024-11-10 18:06:04,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 42.57142857142857) internal successors, (298), 7 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:04,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:04,859 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:04,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:06:04,859 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:04,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:04,860 INFO L85 PathProgramCache]: Analyzing trace with hash 19414, now seen corresponding path program 1 times [2024-11-10 18:06:04,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:04,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989244258] [2024-11-10 18:06:04,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:04,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:05,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:05,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989244258] [2024-11-10 18:06:05,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989244258] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:05,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:05,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:06:05,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534974444] [2024-11-10 18:06:05,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:05,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:06:05,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:05,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:06:05,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:06:05,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 79 [2024-11-10 18:06:05,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 77 transitions, 281 flow. Second operand has 7 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:05,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:05,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 79 [2024-11-10 18:06:05,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:05,578 INFO L124 PetriNetUnfolderBase]: 65/284 cut-off events. [2024-11-10 18:06:05,578 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-11-10 18:06:05,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 284 events. 65/284 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1184 event pairs, 63 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 527. Up to 160 conditions per place. [2024-11-10 18:06:05,580 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 35 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-11-10 18:06:05,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 75 transitions, 369 flow [2024-11-10 18:06:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:06:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:06:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 313 transitions. [2024-11-10 18:06:05,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.566003616636528 [2024-11-10 18:06:05,582 INFO L175 Difference]: Start difference. First operand has 96 places, 77 transitions, 281 flow. Second operand 7 states and 313 transitions. [2024-11-10 18:06:05,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 75 transitions, 369 flow [2024-11-10 18:06:05,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 75 transitions, 347 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:06:05,585 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 277 flow [2024-11-10 18:06:05,585 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=277, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2024-11-10 18:06:05,587 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2024-11-10 18:06:05,587 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 277 flow [2024-11-10 18:06:05,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:05,588 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:05,588 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:05,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:06:05,589 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:05,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:05,589 INFO L85 PathProgramCache]: Analyzing trace with hash 18675043, now seen corresponding path program 1 times [2024-11-10 18:06:05,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:05,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628765558] [2024-11-10 18:06:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:05,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:05,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:05,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628765558] [2024-11-10 18:06:05,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628765558] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:05,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:05,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:06:05,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204703646] [2024-11-10 18:06:05,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:05,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:06:05,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:05,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:06:05,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:06:05,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2024-11-10 18:06:05,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:05,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:05,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2024-11-10 18:06:05,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:06,105 INFO L124 PetriNetUnfolderBase]: 65/282 cut-off events. [2024-11-10 18:06:06,106 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-11-10 18:06:06,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 282 events. 65/282 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1187 event pairs, 63 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 519. Up to 162 conditions per place. [2024-11-10 18:06:06,110 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 32 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-11-10 18:06:06,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 74 transitions, 361 flow [2024-11-10 18:06:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:06:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:06:06,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 249 transitions. [2024-11-10 18:06:06,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6303797468354431 [2024-11-10 18:06:06,112 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 277 flow. Second operand 5 states and 249 transitions. [2024-11-10 18:06:06,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 74 transitions, 361 flow [2024-11-10 18:06:06,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 74 transitions, 339 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:06:06,115 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 275 flow [2024-11-10 18:06:06,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2024-11-10 18:06:06,116 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2024-11-10 18:06:06,116 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 275 flow [2024-11-10 18:06:06,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:06,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:06,117 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:06,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 18:06:06,117 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:06,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:06,118 INFO L85 PathProgramCache]: Analyzing trace with hash 18675042, now seen corresponding path program 1 times [2024-11-10 18:06:06,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:06,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512893475] [2024-11-10 18:06:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:06,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:06,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:06,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512893475] [2024-11-10 18:06:06,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512893475] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:06,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:06,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:06:06,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806668208] [2024-11-10 18:06:06,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:06,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:06:06,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:06:06,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:06:06,342 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 79 [2024-11-10 18:06:06,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 275 flow. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:06,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:06,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 79 [2024-11-10 18:06:06,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:06,453 INFO L124 PetriNetUnfolderBase]: 65/280 cut-off events. [2024-11-10 18:06:06,454 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2024-11-10 18:06:06,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 280 events. 65/280 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1174 event pairs, 63 based on Foata normal form. 2/240 useless extension candidates. Maximal degree in co-relation 521. Up to 162 conditions per place. [2024-11-10 18:06:06,456 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 34 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-11-10 18:06:06,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 73 transitions, 363 flow [2024-11-10 18:06:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:06:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:06:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 241 transitions. [2024-11-10 18:06:06,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.610126582278481 [2024-11-10 18:06:06,458 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 275 flow. Second operand 5 states and 241 transitions. [2024-11-10 18:06:06,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 73 transitions, 363 flow [2024-11-10 18:06:06,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 73 transitions, 341 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:06:06,461 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 273 flow [2024-11-10 18:06:06,461 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2024-11-10 18:06:06,463 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 12 predicate places. [2024-11-10 18:06:06,463 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 273 flow [2024-11-10 18:06:06,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:06,464 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:06,464 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:06,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:06:06,465 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:06,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:06,465 INFO L85 PathProgramCache]: Analyzing trace with hash 717476468, now seen corresponding path program 1 times [2024-11-10 18:06:06,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:06,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259952956] [2024-11-10 18:06:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:06,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:07,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:07,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259952956] [2024-11-10 18:06:07,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259952956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:07,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271353937] [2024-11-10 18:06:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:07,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:07,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:07,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:06:07,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:06:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:07,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-10 18:06:07,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:08,109 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:06:08,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:06:08,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:08,228 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:06:08,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:06:08,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:08,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 18:06:08,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:08,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:08,491 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:06:08,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:08,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-10 18:06:08,906 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 18:06:08,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-10 18:06:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:09,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271353937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:06:09,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:06:09,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 5] total 26 [2024-11-10 18:06:09,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115200851] [2024-11-10 18:06:09,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:06:09,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 18:06:09,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:09,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 18:06:09,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2024-11-10 18:06:12,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 79 [2024-11-10 18:06:12,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 273 flow. Second operand has 28 states, 28 states have (on average 29.821428571428573) internal successors, (835), 28 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:12,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:12,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 79 [2024-11-10 18:06:12,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:13,553 INFO L124 PetriNetUnfolderBase]: 74/339 cut-off events. [2024-11-10 18:06:13,553 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-11-10 18:06:13,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 339 events. 74/339 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1332 event pairs, 72 based on Foata normal form. 10/304 useless extension candidates. Maximal degree in co-relation 665. Up to 182 conditions per place. [2024-11-10 18:06:13,556 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 59 selfloop transitions, 25 changer transitions 0/107 dead transitions. [2024-11-10 18:06:13,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 107 transitions, 575 flow [2024-11-10 18:06:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 18:06:13,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-10 18:06:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 532 transitions. [2024-11-10 18:06:13,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4208860759493671 [2024-11-10 18:06:13,558 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 273 flow. Second operand 16 states and 532 transitions. [2024-11-10 18:06:13,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 107 transitions, 575 flow [2024-11-10 18:06:13,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 107 transitions, 515 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:06:13,562 INFO L231 Difference]: Finished difference. Result has 104 places, 88 transitions, 399 flow [2024-11-10 18:06:13,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=399, PETRI_PLACES=104, PETRI_TRANSITIONS=88} [2024-11-10 18:06:13,563 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 26 predicate places. [2024-11-10 18:06:13,563 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 88 transitions, 399 flow [2024-11-10 18:06:13,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 29.821428571428573) internal successors, (835), 28 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:13,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:13,564 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2024-11-10 18:06:13,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:06:13,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:13,765 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:13,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1254497281, now seen corresponding path program 2 times [2024-11-10 18:06:13,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:13,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483105432] [2024-11-10 18:06:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:13,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:15,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:15,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483105432] [2024-11-10 18:06:15,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483105432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:15,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998131723] [2024-11-10 18:06:15,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:06:15,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:15,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:15,954 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:06:15,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:06:16,236 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:06:16,236 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:06:16,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-11-10 18:06:16,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:16,513 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:06:16,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-10 18:06:16,534 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:06:16,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:06:16,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 18:06:16,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:16,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:16,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:16,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:16,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:16,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:16,925 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:06:16,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:06:16,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:17,009 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:06:17,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:06:17,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 18:06:17,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:17,220 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:06:17,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:06:17,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:17,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-10 18:06:17,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:17,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:17,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:17,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:17,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:06:17,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:17,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-10 18:06:17,811 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 18:06:17,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-10 18:06:18,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:18,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-10 18:06:18,099 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 18:06:18,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-10 18:06:18,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:18,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-10 18:06:18,382 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 18:06:18,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-10 18:06:18,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:18,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-10 18:06:18,675 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 18:06:18,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-10 18:06:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:19,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998131723] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:06:19,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:06:19,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 11] total 50 [2024-11-10 18:06:19,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113899538] [2024-11-10 18:06:19,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:06:19,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-10 18:06:19,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:19,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-10 18:06:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=2288, Unknown=0, NotChecked=0, Total=2652 [2024-11-10 18:06:28,306 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 79 [2024-11-10 18:06:28,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 88 transitions, 399 flow. Second operand has 52 states, 52 states have (on average 38.96153846153846) internal successors, (2026), 52 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:28,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:28,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 79 [2024-11-10 18:06:28,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:29,906 INFO L124 PetriNetUnfolderBase]: 74/399 cut-off events. [2024-11-10 18:06:29,906 INFO L125 PetriNetUnfolderBase]: For 357/357 co-relation queries the response was YES. [2024-11-10 18:06:29,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 399 events. 74/399 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1279 event pairs, 72 based on Foata normal form. 12/366 useless extension candidates. Maximal degree in co-relation 827. Up to 179 conditions per place. [2024-11-10 18:06:29,909 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 76 selfloop transitions, 31 changer transitions 0/133 dead transitions. [2024-11-10 18:06:29,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 133 transitions, 831 flow [2024-11-10 18:06:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-10 18:06:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-10 18:06:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1108 transitions. [2024-11-10 18:06:29,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5194561650257853 [2024-11-10 18:06:29,914 INFO L175 Difference]: Start difference. First operand has 104 places, 88 transitions, 399 flow. Second operand 27 states and 1108 transitions. [2024-11-10 18:06:29,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 133 transitions, 831 flow [2024-11-10 18:06:29,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 133 transitions, 748 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-11-10 18:06:29,919 INFO L231 Difference]: Finished difference. Result has 134 places, 98 transitions, 505 flow [2024-11-10 18:06:29,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=505, PETRI_PLACES=134, PETRI_TRANSITIONS=98} [2024-11-10 18:06:29,920 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 56 predicate places. [2024-11-10 18:06:29,920 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 98 transitions, 505 flow [2024-11-10 18:06:29,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 38.96153846153846) internal successors, (2026), 52 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:29,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:29,923 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2024-11-10 18:06:29,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:06:30,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:30,128 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:30,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:30,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1177736607, now seen corresponding path program 3 times [2024-11-10 18:06:30,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:30,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038880258] [2024-11-10 18:06:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:30,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 444 proven. 101 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:06:31,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:31,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038880258] [2024-11-10 18:06:31,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038880258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:31,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788494855] [2024-11-10 18:06:31,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:06:31,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:31,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:31,016 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:06:31,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process